I agree with the cash part, never finance a toy. And if you absolutely have to 84 months is rediculous and a sucker timeframe. You will always be upside down. And pay a s-load of non deductible interest.
36-48 months would be more financial prudent if financing is needed.
But I sleep better not owe anyone money on any toy or vehicle.
I went to buy my first new car, at 19 years old. Needed my dad to cosign. Dealer was telling me about a 48 month note, back in 1982, Dad said that was to long. He would only cosign for 36 months or less. He Retired as a VP of a bank. He always lectured me about long loans, they were for the bank to make money, not to help me.
Needless to say my longest Auto note ever was 60 months once. That was just to long even with a 10K down.
Now my Car that I got in Feb. interest was 0.9% for 48 months, so rather than take the money out of my money market account making 3% I got a note on it. In the long run its cheeper like that. I could pay the car off today.